Improvement in glass cylinders of pumps



J. BRYAN.

Improvement in Glass Cylinders of Pumps.

No. 130,896. Patented Aug. 27, 1872.

4M. FHOTU'UTHOG/MPIIIC OQMX/USEUENEJS FROCESS.)

, iron clamps,

UNITED STATES JAMES BRYAN, OF NEW YORK, N. Y.

IMPROVEMENT IN GLASS CYLINDERS OF PUMPS- Speeification forming part ofLetters Patent No. 130,896, dated August 27, 1872.

I, JAMES BRYAN, of New York, in the county and State of New York, haveinvented a certain new and useful Improvement in Ale- Pumps, of whichthe following is a specification:

Nature and Object of the Invention.

The said improvement relates to the incorrodible pump, consisting of aglass workingcylinder, with white-metal fittings, inclosed in andsupported on brackets by adjustable screw-bolts, for which Letterslatentwere issued to me on the 8th day of March, 1870. It has been found byexperience, with pumps made in accordance with the said patcut, that theglass barrels, although proved to a pressure of one hundred pounds persquare inch, were likely to be broken under certain circumstances bymoving the handle of the pump. If the outlet were closed when the pistonwas up, and the barrel full of liquor, the movement of the handle thatwould bring the piston down and introduce an additional piece ofpiston-rod inside the barrel, would produce an excessive pressure onhydrostatic principles that would not be obviated by an ordinaryexternal air-vessel. The object, therefore, of the said invention is toconstruct an internal chamber within the barrel that willnot bedependent for its efficiency upon the tightness of a stuffing-box; andthe improvement consists in making the upper cap of the said pump withthe outlet nozzle projecting below the inner face of the cap aboutthree-quarters of an inch, and in also fitting it with a tube whichsimilarly extends around the piston-rod about the same distance. By thismeans the liquor will be prevented rising above the level of thenozzles, and the airspace-will be preserved; and, as the barrel cannotbe entirely filled with liquor, no excessive pressure will be likely tobe obtained that will endanger the glass or other parts of the pump.

Description of the Drawing.

Figure l is a section of a cap made for the said pump according to mysaid invention, and Fig. 2 is a plan of the same inverted.

The outlet or discharge nozzle a and the tube b around the opening forthe piston-rod project below the face of the cap, so that when the capis combined with the barrel an airfhamber is formed at the upper part.of the atter.

Claim.

I claim as my invention-- In combination with the pump constructed andarranged substantially as described in the said patent heretoforeissued, the cap fit-

